Plow.



No. 66!,273. Patented Nov. 6, I900. M. L. RGBERTS'.

PLUW.

(Application filed. Aug. 14, 1900.)

(No Model.)

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MATTHEW L. ROBERTS, OF VVATERTOlVN, SOUTH DAKOTA.

PLOW.

SPECIFICATION formingpart of Letters Patent No. 661,278, dated. November6, 1900.

Application filed August 14,1900. Serial No. 26,881. (No model.)

' by declare the following to be a full, clear, and

exact description of the inven tion,such as will enable others skilledin the art to which it appertains to make and use the same.

This invention aims to lessen the draft of a plow of given size andcapacity and reduce the friction of the slice of earth upon themoldboard.

The invention consists of a share or lay and one or more concavo-convexdisk cutters in combination therewith to cut the slice and turn theearth in the formation of the furrow.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result reference is to be had to the appended descriptionand drawings hereto attached.

While the essential and characteristic features of the invention arenecessarily susceptible of modification, still the preferred embodimentof the invention is illustrated in the accompanying drawings, in which-Figure 1 is a perspective View of a plow embodying the invention. Fig. 2is a top plan view. Fig. 3 is a cross-section on the line 3 3 of Fig. 1.Fig. 4 is an elevation of the plow viewed from the land side.

Corresponding and like parts are referred toin the following descriptionand indicated in all the views of the drawings by the same referencecharacters.

The plow comprises the share or lay 1, front disk 2, and rear disk Thepoint of the share or lay projects forward of the disk 2 and is curvedat its top edge, as shown at 4;, the curved portion about in line withthe top edge of the share conforming to and snugly fitting the concaveface of the lower portion of the disk 2, so as to prevent the formationof any space between the contiguous parts of the share and forward disk.As a result of the close contact of the share with the concave face ofthe disk 2 the latter is kept clean and free from all dirt and mattertending to cling thereto, the share acting in the capacity of a scraperto the performance of this end. The lower edge of the share or lay isstraight from toe to heel, and the share inclines rearwardly andoutwardly in the direction of its length in the usual manner and curvesinward slightly between its top and bottom edges. The upper rear portionof the share is made rounding, as shown at 5, so as to fit close againstthe concave face of the rear disk 3 for a purpose similar to the snugfit between the upper forward portion of the share and the disk 2. Theshare or lay may be connected with the beam 6 in any convenient way,and, as shown, standards 7 and 8 are secured at their lower ends to thecorresponding parts of the share. The front standard 7 is in the planeof the beam 6 and curves downwardly and forwardly, whereas the rearstandard 8 curves downwardly, laterally, and forwardly to receive therear end of the share 1. These standards form branches of the beam,although they may be provided in any desired way.

The front disk 2 is considerably smaller than the rear disk 3, and itsforward edge is about in the plane of the inner or top edge of theplow-point and acts in the capacity of a colter to cut grass, roots, andother growth. This disk is suitably supported and, as shown, is mountedupon a standard 9, clipped or otherwise adjnstably attached at its upperend to the beam 6. The disk 2 inclines with reference to the line ofmotion of the implement to conform approximately to the set orhorizontal inclination of the share or lay 1 and cooperates therewith togive the initial turn to the slice of earth when turning the furrow.

The rear disk 3 is of larger diameter than the disk 2 and performs thefunction of a moldboard in completing the turning of the slice of earth.This disk also inclines with reference to the line of motion of theimplement and in conformity to the longitudinal inclination of theshare 1. The front portion of the disk 3 underlaps the rear portion ofthe disk 2, so as not to offer any impediment to the free passage of theearth from the disk 2 thereon. The disks are mounted to rotate abouthorizontal axes, thereby obviating sliding friction between theirconcave faces and the earth passing thereover, and as a result the draftis materially diminished and the plow made easy-running.

The furrow-wheel 10 is inclined from the perpendicular away from themoldboard at its lower portion, and its rim or tread-surface iscorrespondingly inclined, so as to enable it to run squarely upon thebottom of the furrow. The furrow-wheel is located opposite the rear disk3 and between the standards 7 and 8 and is journaled to the lower-end ofan intermediate standard 11, likewise forming a branch of the beam 6.The provision of a landside of ordinary construction is obviated by theelemental construction herein specified. Hence the resultant frictionbetween the Vertical wall of the furrow and the landside is obviated,and this is a material factor in reducing the draft and enabling theplow to run easier than implements of this character as heretoforecommonly constructed. The rear disk 3 is journaled to an arm 12, clippedto the standard 8 in such a manner as to admit of its adjustment as maybe required to secure the proper set and a close joint between its lowerconcave face and the upper portion of the share 1.

Having thus described the invention, what is claimed as new is 1. In aplow, and in combination with a share, front and rear disks cooperatingwith the share, the forward portion of the rear disk underlapping therear portion of the forward disk, substantially as set forth.

2. In a plow, and in combination with a share, front and rear disks ofdifferent diameters, the forward disk being the smaller and having itsrear portion overlapping the front portion of the rear disk,substantially as set forth.

3. In combination with the share of a plow having its upper front andrear edge portions curved, front and rear disks having their lowerconcave faces snugly fitting the corresponding edge portions of theshare, the rear disk being of larger diameter than the front disk andhaving its front portion underlapping the rear part of the front disk,substantially as set forth.

4:. In a plow, front and rear standards connected at their upper ends tothe beam, the front standard being about in the plane of said beam andthe rear standard curving laterally, a share secured at its ends to theend portions of the said standards and having its upper front and rearedge portions curved, and frontand rear concavo-convex disks overlappingand having the lower portion of their concave faces snugly fitting thecorresponding curved edges of the said share, substantially as setforth.

5. In combination, a beam having a front, a rear and an intermediatestandard branching therefrom, a share secured to the terminal portionsof the front and rear standards, front and rear disks cooperating withthe share in the manner set forth, and a furrowwheel journaled to thelower end of the intermediate standard and located between the

